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    The first name Cassius

    A boy’s name from Latin.

    Pronounced /ˈkæsi.əs/ 2 syllables Male

    Meaning and origin

    Latin origin

    Borrowed from Latin Cassius, a Roman name derived from the gens Cassia.

    From Wiktionary (CC BY-SA 4.0).

    Popularity

    Babies registered in England and Wales, 1996–2025

    In 2025, 140 boys were named Cassius, making it the 319th most popular boys’ name. It peaked in 2023, with 174 births (#263).

    0100200 1996200020052010201520202025
    2,472
    babies named Cassius, 1996–2025
    #319
    rank in 2025
    2023
    peak year

    Office for National Statistics; years with fewer than three births are not published and show as zero. Compare Cassius with other names.

    Popularity in the United States

    Babies named Cassius at birth, 1880–2025

    In 2025, 504 boys born in the United States were named Cassius, the 583rd most popular boys’ name that year. It was used most in 2021, when 607 were.

    0350700 188018851890189519001905191019151920192519301935194019451950195519601965197019751980198519901995200020052010201520202025
    9,766
    babies named Cassius since 1880
    #583
    rank in 2025
    2021
    peak year

    US Social Security Administration, from applications for a Social Security card. A name is only published for a year when at least five babies were given it, so quieter years show as zero.

    Cassius in other languages

    Equivalent forms of the name, from Wiktionary

    Cassio
    Italian
    Cássio
    Portuguese

    Nicknames and spellings

    Nicknames for Cassius

    Famous people named Cassius

    7 on Wikidata, most written-about first

    • Cassius Marcellus Coolidge
      American artist (1844-1934)
    • Cassius M. Clay
      American planter, politician and ambassador to Russia (1810-1903)
    • Cassius Jackson Keyser
      American mathematician and journalist of pronounced philosophical inclinations (1862-1947)
    • Cassius Winston
      American basketball player (born 1998)
    • Cassius Stanley
      American basketball player (born 1999)
    • Cassius of Narni
      Bishop of Narni, 550–558
    • Cassius Duran
      Brazilian diver (1979-)

    More Latin boys’ names

    All 381 names of Latin origin

    Questions

    What does the name Cassius mean?
    Borrowed from Latin Cassius, a Roman name derived from the gens Cassia.
    What is the origin of the name Cassius?
    Borrowed from Latin Cassius, a Roman name derived from the gens Cassia.
    How popular is the name Cassius?
    In 2025, 140 boys born in England and Wales were named Cassius, ranking 319th. Its peak was 2023, with 174 births.
    What are nicknames for Cassius?
    Common nicknames for Cassius include Cass.
    Is Cassius a boy's or a girl's name?
    Mostly a boy's name: 100% of the 9,766 US babies named Cassius since 1880 were boys.
    When was Cassius most popular?
    2021 in the United States, when 607 babies were named Cassius, its highest rank at 487th.
    How do you pronounce Cassius?
    Cassius is /ˈkæsi.əs/, 2 syllables.